Underground irrigation method and system

Abstract

An irrigation system comprising an energized cooling system for cooling the fluid to a temperature below ground temperature, colosed-loop condensation piping buried under ground surface and an energized fluid circulating arrangement for circulating the fluid through the system, whereby propelling the cooled fluid through the piping extracts moisture from the ground by condensation over the piping, for consumption by agriculture growth in the vicinity of the piping.

What is claimed is:  
     
       1. An irrigation system for agricultural growth having a liquid circulating therein, comprising an energized cooling system for cooling the liquid to a temperature below ground temperature, closed-loop condensation piping buried under the ground surface and in the vicinity of the agricultural growth, and an energized liquid circulating arrangement for circulating the liquid through the system, whereby propelling the cooled liquid through the piping extracts moisture from the ground by condensation over the piping for consumption by the agriculture growth in the vicinity of the piping. 
     
     
       2. An irrigation system according to  claim 1 , wherein a liquid reservoir is provided. 
     
     
       3. An irrigation system according to  claim 2 , wherein at least the liquid reservoir is placed under ground. 
     
     
       4. An irrigation system according to  claim 1 , wherein the cooling system includes at least one heat exchanger. 
     
     
       5. An irrigation system according to  claim 1 , wherein one or both of the liquid circulating arrangement and the cooling system are energized by an energy extracted from at least one of the following: solar, wind, electric, hydraulic and biomass energy source. 
     
     
       6. An irrigation system according to  claim 1 , wherein the piping is circular and has a sheath thereon, the sheath having a surface area greater than that of the circular piping, thereby increasing the amount of liquid condensed thereon. 
     
     
       7. An irrigation system according to  claim 6 , wherein the sheath on the piping has an indented or serrated surface. 
     
     
       8. An irrigation system according to  claim 1 , wherein a control system is provided for retaining a substantially constant change in temperature ΔT by regulating liquid temperature, where: 
       
         
           
             ΔT=T 
             g 
             −T 
             f  
           
         
       
       T g  =ground temperature measured at the vicinity of the piping;  
       T f  =liquid temperature running through the piping, and where T f >0.  
     
     
       9. An irrigation system according to  claim 8 , wherein the control system governs flow parameters and operative patterns of the irrigation system. 
     
     
       10. An irrigation system according to  claim 1 , wherein the energized cooling system comprises one or more cooling units. 
     
     
       11. A method of underground irrigation for agricultural growth according to which a liquid is propelled at a temperature below ground temperature, through a closed piping system buried below ground surface and in the vinicity of the agricultural growth thereby condensing liquid over the closed piping system for consumption by the agriculture growth in the vicinity of the piping. 
     
     
       12. An irrigation method according to  claim 11 , wherein the closed piping system is connected to a reservoir, a circulating arrangement and a cooling system for chilling the liquid. 
     
     
       13. An irrigation method according to  claim 11 , wherein a sheath is provided for the piping; thereby increasing the amount of liquid condensed thereon. 
     
     
       14. An irrigation system according to  claim 11 , wherein a control system is provided for retaining a substantially constant change in temperature ΔT by regulating fluid temperature, where: 
       
         
           
             ΔT=T 
             g 
             −T 
             f  
           
         
       
       T g  =ground temperature measure at the vicinity of the piping;  
       T f  =fluid temperature ruing through the piping, and where T f >0.  
     
     
       15. An irrigation system for agricultural growth having roots disposed at a given depth in the soil, comprising pipes buried in the soil at approximately the given depth of the roots of the agricultural growth, the pipes having a liquid circulating therein at a temperature which is less than the soil temperature at the vicinity of the pipes, such that moisture is drawn out of the soil and forms condensation on the pipes, thereby irrigating the soil at the given depth of the roots of the agricultural growth, and control means for providing a substantially constant difference between the soil temperature at the vicinity of the pipes and the temperature of the liquid running through the pipes. 
     
     
       16. A method of irrigating agricultural growth, wherein the agricultural growth has roots buried at a given depth, and wherein the soil adjacent to the roots is at a given temperature, comprising the steps of providing pipes and burying the pipes at approximately the given depth of the roots, and circulating a liquid through the pipes at a temperature which is less than the given temperature of the soil adjacent to the roots, thereby drawing moisture out of the soil and forming condensation on the pipes, and thereby irrigating the roots of the agricultural growth. 
     
     
       17. The method of  claim 16 , further including the step of providing a control means to maintain a substantially constant difference between the temperature of the soil in the vicinity of the pipes and the temperature of the fluid in the pipes.